Packing for pump-plungers



Patented Feb. 23, 1 897.

(No Model.)

B. F. WILLISTOPL PACKING FOR PUMP PLUNGERS,

UNl'TED STATES PATENT FFIQEQ BENJAMIN F. VVILLISTON, OF JACKSON, MICHIGAN.

SPECIFICATION forming part of Letters Patent No. 577,570, dated February 23, 1897.

Application filed September 24, 1896. Serial No. 606,831. (No modeL) T0 aZZ whom it may concern:

Beit known that I, BENJAMIN F. WILLIs- TON, a citizen of the United States, residing at Jackson, in the county of Jackson and State of Michigan, have invented certain new and useful Improvements in Packing for Pump-Plungers, of which the following is a specification, reference being had therein to the accompanying drawings.

The invention consists in a novel construction, arrangement, and combination of parts constituting a packing for a pump-plunger, all as more fully hereinafter described, and shown in the drawings, in which Figure 1 is a vertical central longitudinal section through the cylinder and plunger of a well-known form of steam-pump, showing my improved packing applied to the plunger thereof. Fig. 2is a cross-section on line 00 at, looking toward the left.

A represents the plunger of a steam-pump of the well-known character, in which the cylinder is provided with an apertured partition or bridge 13, forming two chambers O and D on opposite sides thereof, into which the Water is alternately admitted and expelled therefrom by the reciprocative movement of the plunger in the well-known operation of the pump, the construction of which may be otherwise of any known form.

My invention has reference to a packing secured in the bridge around the plunger, and the construction of which is as follows: A bushing E, which is fitted in the aperture of the bridge and extends through it, is formed with annular recesses in the opposite ends, which recesses are separated by a standing flange F in the center of the bushing. In each recess are fitted side by side two or more metallic packing-rings G, which are adapted to fit around the plunger and by being split open in the usual manner provide for the wear of the plunger. The packing-rings G in each recess are inclosed within another packing-ring II, which has the combined width of the packing-rings G, and interposed between this ring and the rings G is a gasket I of lead, block-tin, or other like compressible material. The packing rings H are also of metal and split open, so that they may freely contract with the rings Git the plunger wears away. The recesses in the bushing are large enough to receive these several packing-rings and also to leave a spaceJ in each recess back of the rings all around. The packing-rings are confined in these recesses by means of flanged packing-glands K and L, the former being screw-threaded into the end of the bushing and the latter being formed with ears M for the reception of bolts N, by means of which said gland is directly bolted to the bridge B, and as the bushing E is formed on the same side with an annular flange E these bolts also hold the bushing in position in the bridge. The annular spaces .I behind the packi ng-rings are in communication with the pump-chambers G and D, respectively. To this end circular orifices a, formed by means of complementary half-circular grooves in the meeting faces of the glands and bushing, communicate into annular circular channels 19, formed in a similar manner by means of complementary half-circular grooves in the vertical meeting faces of the glands and bushing, and these again communicate by enlarged orifices 0 through the flanges of the glands into the chambers O and D, respectively.

In practice, the parts being constructed and arranged as shown and described, it will be seen that as the plunger reciprocates one or the other set of packing-rings in the bridge will be firmly compressed around the plunger by the pressure of the water which acts through the orifices and the spaces J against the outer rings I, which are thereby contracted around the inner rings G and hold the latter firmly around the plunger, while at the same time the gasket between is firmly compressed and closes all the joints between the rings and the walls of the recesses, so that no leakage of water can take place from one chamber into the other.

My packing does not create any undue friction, and whatever friction it produces is proportionate to the pressure of the water and is distributed equally all around. While thus very efficient it is very simple and durable and can be quickly adjusted or repaired, it being possible to remove or renew either set of packing-rings independently of the other.

What I claim as my invention is- 1. In a packing for plunger-pistons, the

ICO

combination with the pump-cylinder and bridge dividing the same into two chambers, of a bushing recessed in opposite ends, a set of metallic packing-rim gs in each recess,spaces formed behind the packing-rings communieating through orifices With the chambers of the pumping-cylinder, and glands secured in the ends of the bushing to hold the packingrings in position, one of said glands being directly secured by bolts to the bridge to de tachably hold the packing in position in the bridge.

2. In a packing for plunger or piston, the combination with the pump-cylinder and bridge dividing the same into two chambers, of the bushing E formed with recesses in op- 

